package com;

import java.util.Calendar;
import java.util.Date;

public class Test {
    public static void main(String[] args) {
//        Date date = new Date();
//        Calendar calendar = Calendar.getInstance();
//        calendar.setTime(date);
//        int week = calendar.get(Calendar.DAY_OF_WEEK);
//        System.out.println(week);
        Long d = 21l;
        int i = 4;
        System.out.println(d.doubleValue()/i);
    }
}
